Box-connector for electric installation.



W. H. VIBBER. BOX CONNECTOR FOR ELECTRIC INSTALLATION.

APPLICATION FILED JAN. 15, 1914.

1,1 34,565. Patented Apr. 6, 1915.

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THE NORRIS PETERS CO.. PHOT0-LITHO.. WASHING TON I). c.

p'Nr En sTaTEs PATENT, o rro WHEELER H. VIBBEB, OF NEW LONDON, CONNECTICUT, 'ASSIGNOR for ONE-HALF To THE GILLETTE-VIBBERCO OF NEW LONDON, CONNECTICU A CORPORATION.

BOX-CONNECTOR FOR- ELECTR-IC INSTALLATION.

I new and useful Improvement in Box-Connectors for Electric Installation; and I do hereby declare the, following, when taken 1n connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-- Figure 1 a view in side elevation of a boxconnector for electric installation, constructed in accordance with myinventiorr. Fig 2 a view thereof in end elevation, looking toward its coupling end. Fig. 3 abroken view thereof in longitudinal section, showing its application toan outlet box. Fig, 4 a broken view of the outlet box in inside elevation showing my improved box-connector coupled thereto. Fig. 5 a detached view in side elevation of one of the modified forms which my improved box-connector may assume. Fig. 6 a view of the outer end thereof.

My invention relates to an improved boxconnector for use in electric installation, the object being to provide a simple, durable and effective box-connector constructed with particular reference to ease of application to the box.

With these ends 1n view, my'1nvent1on consists 1n a box-connector for use in electric installation, having certain details of 7 construction as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ what, for want of a better term, I shall call a bushing 2 formed at its inner or coupling end with an eccentric circular bearing-flange 3 carrying a couplingscrew 4 extending from rear to front and coacting with an abutment consisting, as shown, of a concentric beveled shoulder 5 pitched directly toward the screw 4 so as to clear the head of the screw when the same is turned down into its coupling position as shown in Fig. 3. The said abutment shoulder 5 and screw 4 are respectively. located on opposite sides of the opening in the inner or coupling-end of the bushing and proportioned and positioned so that the distance Specification of Letters ZE'atent.

Patented Apiufi, 1915,.

Application filed January 15, 1914. Serial No. 812,220. 7

between the abutment point 6 of the shoulder and the outer face 7 of the shank of the screw, is a trifle less than the diameterof the holes in standard boxes. Thus the distance between the points 6 and .7 is a little less than the diameter of the hole 8 in thefoutlet-box 9. The flange 3 because of its eccentric position forms a fulcrum point 10 which assists in preventing the flange as a whole, from rocking on the box.

7 To couple my improved box-connector with an outlet box, whatever the character of the same may be, the screw is reversed into. its clearance positlon after which the box -connector is tilted with respect to. the plane of the box, and the screw 4 and abutment shoulder 5 maneuvered,so to speak,

into the opening 8. Then when the bear- The flange 3 carrying the axis ofcthe bushing. Thus, in the modi: fied form shown in Figs. 5 and6, the flange '13 is located at an angle of 45 with respect to the axis of the bushing 12, the said flange being furnished with a coupling screw 14 and the bushing with an abutment lug 15 to which some rake is given to increase its grip upon the edge of the hole in the box. In this modified form of my device, the bushing 10 is cut away as at 16 to adapt it to be more readily maneuvered into the hole in the box.

As shown in Figs. 1 to 4 inclusive, the outer or clamping end of thebushing is formed with a transverse slot 17 receiving a binding-strap 18 of a clamp the ends of which are perforated for the reception of a clampingscrew 19 carrying a nut 20, where by the strap 18 is boundupon the armor 21 which incloses the wires which are not shown. It will be observed by reference to Fig. 3 that the central passage of the bushing is reduced in diameter at its inner end and that thearmor 21 does not pass through the bushing but stops therein, being entered thereinto and secured in place by aclamp applied to the outer or clamping-end of the the screw 4 may be, i located at any deslred angle with respect to bushing, whereby the armor is firmly attached to the bushing and through the medium of the bushing to the outlet-box 9. This is true whether the armor is made of metal as shown in Fig. 8, or consists of a fibrous envelop such as a woven tube of any character.

In the construction shown in Figs. 5 and 6, the outer end of the box-connector is formed with a slot 22 resulting in the production of two integral clamping arms 23 and 22% carrying a bindin screw 25.

I claim 1. A. box-connector for use in electric installation, consisting of a bushing having its inner or coupling-end provided with an abutment and with a lateral flange carrying a c0uplingscrew acting in opposition to the said abutment, the said abutment and screw being respectively located on opposite sides or" the opening in the inner or coupling-end of the bushing and proportioned in their separation to the size of the hole or holes in the outlet box and the outer or clampingend of the bushing being provided with a clamp for gripping the protecting envelop which is entered into, but does not itself pass through the bushing which serves to connect the said envelop to the outlet box while the conductor passes through the bushing.

2. A box-connector for use in electric installation, consisting of a bushing having its inner or coupling-end provided with a lateral flange carrying a coupling-screw and having an annular abutment projecting beyond the face of the flange and beveled for the clearance of the head of the screw, the active point of the abutment and the shank of the screw being respectively located on opposite sides of the opening in the inner or coupling-end of the bushing and proportioned in their separation to the size of the hole or holes in the outlet box.

In testimony whereof, I have signed this specification in. the presence of two subscribing witnesses.

WHEELER H. VIBBER. Witnesses GEo. E. DOUTON,

EDNA R. MAYNARD.

@opies of this patent may be iobtained for five cents each, by addressing the Commissioner 0;? Patents, Washington, D. t3. 

